<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>注册页面</h1>
    <input type="text" placeholder="用户名" v-model="user.username">
    <input type="text" placeholder="密码" v-model="user.password">
    <input type="text" placeholder="昵称" v-model="user.nickname">
    <input type="button" value="注册" @click="reg()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
  let v =new Vue({
    el:"body>div",
    data:{
      user:{
          username:"",
          password:"",
          nickname:""
      }
    },
    methods:{
      reg(){
          axios.post("/reg",v.user).then(function (response) {
              if (response.data==1){
                  alert("注册成功");
                  location.href="/";
              }else {
                  alert("用户名已存在")
              }
          })
      }
    }
  })
</script>
</body>
</html>